lO GAMOPETALJBL 



e. Style one or none^ etigmaa ttoo. 



Learei opposite or whorled, sessile, entire GentianacesB 



LeaTes opposite, lobed: flowers small in spikes Verbenacese, 



Leaves alternate or radical, 3-foliolate: corolla bearded Menyanthes. 



Leares alternate. Flowers not axillary Hydropliyllaceas 



Flowers in a head with acerose bracts Gilia 



Flowers funnelform: twining or creeping vines Convolvulus 



Itetres radical: flowers solitary on scapes Hesperochiron 



i. Style 1, siigmaa S PolemoniaceaB 



«. Style 2-clefl Hydrophyllaceae 



/. Styles 2: leaves simple and alternate or none, 



blowers solitary, axillary, white: leaves silky Cressa 



Mowers clustered on filiform, leafless orange or yellow twining stems Cuscuta, 



Flowers 6 or 6 lines long: shrubs or wood- based herbs HydrophyllaceaB 



7f 

 105 

 80 

 84 

 80 

 91 

 87 



80 

 84 



91 

 91 



84 



• * * Stamens fetoer than the lobes of the slightly irregular corolla. 



Stamens 4: flowers in slender spikes: leaves opposite, lobed Verbenacese, 105 



Stamens 3: style 3-cleft: sepals 2: leaves opposite, entire. Montia, 32 



Stamens 2 or 4: ovary 2-celled Scrophulariaceae, 93 



2. Flowers irregular : style 1 ; stigma entire or 2-lobed. 



Leaves or scales not opposite. 



Corolla flattened, heart-shaped: stamens 6, united in 3's^ Dicentra, 19 



Corolla curved: leafless root-parasites: stamens 4 OrobanchaceaB, 104 



Corolla more or less 2-lipped: ovary 2-celled: stamens 2 to 5 . ^ ScrophulariaceaB, 93 



Corolla 2-lipped, spurred: ovary 1 -celled: stamens 2: aquatic. . Lentibnlariaceae, 104 



Leaves opposite or whorled: stamens 2 or 4. 



Ovary 2-celled .Scropliulariace®, 93 



Ovary 4-parted, forming 4 seed-like nutlets ^ Labiates, 105 



Ovary 2-4-lobed: small flowers in spikes or heads ....^ ••• .Veibenaceae, 105 



DIVISION 3.— APETAL^ 



A. OVABY INFEBIOB. (calyx adherent) or apparently so. 



Leaves cordate: calyx 3-lobed: ovary 6-celled. (See Cal. Flora). . Aristolochiacese. 



Leaves palmately lobed tendril-bearing vines Cucurbitaceas, 64 



Leaves pinnate: calyx- tube 3-4-angled, prickly Kosacese. 4d 



